Work Quiz

What is the SI base unit of work?

• Newtons

• Joules

• Watts

• Meters

Theta is the angle that forms between the force and

• Displacement

• Radius

• Time

• velocity

In which of the following scenarios is no work done?

• A child picks up a toy

• A student holds a stack of books.

• A crane lowers a large steel beam to the ground.

• A cat jumps up on a couch.

How can work be negative?

• If force and displacement are in the same direction.

• If force and displacement are perpendicular.

• If the force of gravity is on an incline.

• If the force and displacement are in opposite directions.

What is the work-kinetic energy theorem?

• The net work done on an object equals the kinetic energy of the object.

• The change in work done on an object equals the kinetic energy of the object. 

• Work does not equal kinetic energy.

• The net work done on an object equals the change in kinetic energy of the object.

What is the common formula for work?

• W = Fdcos (θ)

• W = Fd

• W = Fd²

• W = F²d

A worker pushes a wheelbarrow with a horizontal force of 50.0 N over a level distance of 5.0 m. If a frictional force of 43 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow?

• 250 J

• 0.0 J

• 35 J

• 10.0 J

A hill is 100 m long and makes an angle of 12° with the horizontal. As a 50 kg jogger runs up the hill, how much work does gravity do on the jogger?

• 5.0 x 10⁴ J

• 1.0 x 10⁴ J

• -1.0 x 10⁴ J

• 0 J

A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. How much work is done by the worker on the wheelbarrow?

• 10 J

• 1250 J

• 250 J

• 55 J

The magnitude of the component of the force that does the work is 43.0 N. How much work is done on a bookshelf being pulled 5.00 m at an angle of 37.0° from the horizontal?

• 172 J

• 215 J

• 129 J

• 792 J